Sheet member and exhaust gas processing device and manufacturing method of the same

Abstract

A sheet member including inorganic fibers, the sheet member having multiple inter-woven points formed on at least either a surface or a back side of the sheet member by a needling process, wherein a density ρ of the inter-woven points is in a range about 0.5 number/cm 2 ≦ρ<about 20 number/cm 2 .

1 . A sheet member including inorganic fibers, the sheet member having multiple inter-woven points formed on at least either a surface or a back side of the sheet member by a needling process,
 wherein a density ρ of the inter-woven points is in a range about 0.5 number/cm 2 ≦ρ<about 20 number/cm 2 .   
   
   
       2 . The sheet member as claimed in  claim 1 ,
 wherein the inter-woven points are formed in a row pattern distributed in a whole area or all over the whole area on at least either the surface or the back side of the sheet member.   
   
   
       3 . The sheet member as claimed in  claims 1  or  2 ,
 wherein the sheet member comprises binders.   
   
   
       4 . The sheet member as claimed in any one of  claims 1  to  3 ,
 wherein the inorganic fibers are a mixture of alumina and silica.   
   
   
       5 . An exhaust gas processing device comprising:
 an exhaust gas processing body,   a holding sealer used with at least a portion of outer surfaces of the exhaust gas processing body, and   a casing housing the exhaust gas processing body around which processing body is wound the holding sealer,   wherein the holding sealer includes inorganic fibers in a sheet member having multiple inter-woven points formed on at least either a surface or a back side of the sheet member by a needling process,   wherein a density ρ of the inter-woven points is in a range about 0.5 number/cm 2 ≦ρ<about 20 number/cm 2 .   
   
   
       6 . The exhaust gas processing device as claimed in  claim 5 ,
 wherein the inter-woven points are formed in a row pattern distributed in a whole area or all over the whole area on at least either the surface or the back side of the sheet member.   
   
   
       7 . The exhaust gas processing device as claimed in  claims 5  or  6 ,
 wherein the exhaust gas processing body is a catalyst carrier or an exhaust gas filter.   
   
   
       8 . The exhaust gas processing device as claimed in any one of  claims 5  to  7 ,
 wherein the exhaust gas processing body around which processing body the holding sealer is wound is placed into the casing by a clamshell method, a winding and closing method, or a sizing method.   
   
   
       9 . The exhaust gas processing device as claimed in any one of  claims 5  to  7 ,
 wherein the density ρ of the inter-woven points is in a range about 5 number/cm 2 ≦ρ<about 20 number/cm 2 , and   the exhaust gas processing body around which is wound the holding sealer is placed into the casing by a pressing method.   
   
   
       10 . A manufacturing method of an exhaust gas processing device including an exhaust gas processing body, a holding sealer, and a casing housing the exhaust gas processing body and the holding sealer inside;
 wherein the manufacturing method comprises:   a step of providing the holding sealer,   a step of winding the holding sealer onto at least a part of an outer surface of the exhaust gas processing body, and   a step of placing the exhaust gas processing body around which processing body is wound the holding sealer into the casing by a clamshell method, a winding and closing method, or a sizing method,   wherein the holding sealer includes inorganic fibers in a sheet member having multiple inter-woven points formed on at least either a surface or a back side of the sheet member by a needling process,   wherein a density ρ of the inter-woven points is in a range about 0.5 number/cm 2 ≦ρ<about 20 number/cm 2 .   
   
   
       11 . The manufacturing method of an exhaust gas processing device as claimed in  claim 10 ,
 wherein the density ρ of the inter-woven points is in a range about 0.5 number/cm 2 ≦ρ<about 15 number/cm 2 .   
   
   
       12 . A manufacturing method of an exhaust gas processing device including an exhaust gas processing body, a holding sealer, and a casing housing the exhaust gas processing body and the holding sealer inside;
 wherein the manufacturing method comprises:   a step of providing the holding sealer,   a step of winding the holding sealer onto at least a part of an outer surface of the exhaust gas processing body, and   a step of placing the exhaust gas processing body around which is wound the holding sealer into the casing by a pressing method,   wherein the holding sealer includes inorganic fibers in a sheet member having multiple inter-woven points formed on at least either a surface or a back side of the sheet member by a needling process,   wherein a density ρ of the inter-woven points is in a range about 5 number/cm 2 ≦ρ<about 20 number/cm 2 .   
   
   
       13 . The manufacturing method of an exhaust gas processing device as claimed in  claim 12 ,
 wherein the density ρ of the inter-woven points is in a range about 5 number/cm 2 ≦ρ<about 15 number/cm 2 .   
   
   
       14 . The manufacturing method of an exhaust gas processing device as claimed in any one of  claims 10  to  13 ,
 wherein the inter-woven points are formed in a row pattern distributed in a whole area or all over the whole area on at least either the surface or the back side of the sheet member.